so i suggested that he go to the fbi. the fbi was skeptical. he called me back. and complained about this. i suggested he go to the rosemont police department, which he did. chief james berlin has been doing a very professional job of investigating this. >> and now they're digging up the driveway. so i guess in some ways someone believed that he was credible. there are some things about this tipster, i know, even though i know you've expressed your doubt about whether the body is actually under that driveway, but there are some things about this tipster that you say at least make him a credible figure. what are they? >> well, he was a gambler who had a connection with a bookmaker who, as susan said in her report, was connected to tony giacalone. tony giacalone was a major mafia figure in detroit who died in 2001. but in 1975, he was one of the two people that jimmy hoffa was supposed to meet at the time he disappeared. so that's what intrigued us about all of this. and the police viewed him as credible enough to do what they're doing now. >> why is he coming forw